Advanced quadrature sigma-delta modulator designs for A/D interface

doi:10.1017/CBO9780511744839.015

14 - Advanced quadrature sigma-delta modulator designs for A/D interface

from Part III - DUC, DDC, ADC, DAC, and NCO

Published online by Cambridge University Press: 07 October 2011

Jaakko Marttila and

Edited by

Fa-Long Luo: Affiliation:
Element CXI, San Jose, California

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Summary

Sigma-delta basics

The principle of oversampling the analog-to-digital converter (ADC) with negative feedback has been invented decades ago and is still being developed further by scientists all over the world. Today’s state-of-the-art converters have come a long way from the first ADCs employing the ΣΔ principle in the 1960s. There is quite a broad selection of ΣΔ oriented publications in the literature since the 1960s and early development phases have also been documented in a comprehensive manner, e.g., in [2], [4] and [52]. On the basis of [2], and following the outline of [35], this chapter aims to present the theory and technology of the advanced quadrature sigma-delta modulator designs for A/D interface. The chapter is organized into six sections. In the rest of the first section, we outline the basics of sigma-delta modulation. Section 14.2 is devoted to extending the discussion on some further modulator concepts and selected advanced quadrature structures will be presented in Section 14.3. Related implementation nonidealities are discussed in Section 14.4. Section 14.5 gives some simulation examples on the advanced structures introduced in Section 14.3, taking also circuit nonidealities into account. Section 14.6 will present related conclusions.

The origin of modern ΣΔ modulation is in delta modulation and differential pulse-code modulation (PCM). Delta modulation was invented in ITT laboratories in France in 1946, as was also the classical version of the PCM. Differential PCM system was patented in 1950 by Bell Telephone Labs.

Type: Chapter
Information: Digital Front-End in Wireless Communications and Broadcasting
Circuits and Signal Processing
, pp. 413 - 449

DOI: https://doi.org/10.1017/CBO9780511744839.015 [Opens in a new window]

Publisher: Cambridge University Press

Print publication year: 2011

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